Frost dates for 57732Deadwood, SD
The average last spring frost in Deadwood is May 24 and the average first fall frost is September 25, giving a typical growing season of about 125 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 24
- Average first fall frost
- Sep 25
- Growing season
- 125 days
Safer after Jun 6 (1-in-10 risk)
Possible by Sep 9 (1-in-10 risk)
Last frost typically in 203 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | May 18 · May 31 · Jun 16 | Sep 1 · Sep 16 · Sep 29 | 107 days | 100% |
| Frost / freeze (32°F) | May 7 · May 24 · Jun 6 | Sep 9 · Sep 25 · Oct 9 | 125 days | 100% |
| Hard freeze (28°F) | Apr 27 · May 14 · Jun 2 | Sep 16 · Oct 3 · Oct 18 | 143 days | 100% |
Planting calendar for Deadwood
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Apr 23 – Jun 29 |
| Tomatoes | Transplant outdoors | Jun 9 – Jun 5 |
| Peppers | Start seeds indoors | Apr 23 – May 24 |
| Peppers | Transplant outdoors | Jun 23 – Jul 24 |
| Eggplant | Start seeds indoors | May 10 – Jun 8 |
| Eggplant | Transplant outdoors | Jun 23 – Jul 24 |
| Cucumbers | Sow outdoors | Jun 23 – Jun 15 |
| Summer squash | Sow outdoors | Jun 9 – Jul 24 |
| Winter squash & pumpkins | Sow outdoors | Jun 23 – Jul 24 |
| Snap beans | Sow outdoors | Jun 9 – Jul 8 |
| Sweet corn | Sow outdoors | Jun 9 – Jun 5 |
| Watermelon & cantaloupe | Sow outdoors | Jun 23 – Jul 24 |
| Okra | Sow outdoors | Jun 16 – Jul 9 |
| Peas | Sow outdoors (spring) | Apr 23 – Jun 8 |
| Potatoes | Plant outdoors (spring) | Apr 23 – Jun 23 |
| Onions | Start seeds indoors (spring) | Mar 12 – Apr 8 |
| Onions | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (spring) | Apr 5 – May 9 |
| Broccoli | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (fall) | May 26 – Jun 5 |
| Broccoli | Transplant outdoors (fall) | Jun 25 – Jul 6 |
| Cabbage | Start seeds indoors (spring) | Mar 26 – Apr 23 |
| Cabbage | Transplant outdoors (spring) | Apr 23 – May 24 |
| Cabbage | Start seeds indoors (fall) | May 16 – Jun 15 |
| Cabbage | Transplant outdoors (fall) | Jun 15 – Jul 16 |
| Leaf lettuce | Sow outdoors (spring) | Apr 23 – Jul 9 |
| Leaf lettuce | Sow outdoors (fall) | Jun 15 – Aug 1 |
| Spinach | Sow outdoors (spring) | Apr 16 – May 30 |
| Spinach | Sow outdoors (fall) | Jul 2 – Aug 6 |
| Radishes | Sow outdoors (spring) | Apr 23 – Jun 13 |
| Radishes | Sow outdoors (fall) | Jun 15 – Aug 16 |
| Kale | Sow outdoors (spring) | May 10 – May 30 |
| Kale | Sow outdoors (fall) | Jun 8 – Jul 16 |
| Carrots | Sow outdoors (spring) | May 24 – Jul 9 |
| Carrots | Sow outdoors (fall) | May 16 – Jul 1 |
| Garlic | Plant outdoors (fall) | Sep 15 – Oct 16 |
Where these dates come from
ZIP code 57732 is matched to the NOAA station Deadwood, SD, 0.4 km away, at 4,670 ft elevation (136 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Deadwood, SD (used) | 4,670 ft | May 24 | Sep 25 |
| Lead, SD | 5,112 ft | May 18 | Sep 29 |
| Spearfish, SD | 3,633 ft | May 12 | Oct 2 |
| Ft Meade, SD | 3,308 ft | May 8 | Oct 3 |
Frost dates near Deadwood
- Whitewood, SD 57793 · last May 12, first Oct 2
- Lead, SD 57754 · last May 18, first Sep 29
- Spearfish, SD 57783 · last May 12, first Oct 2
- Saint Onge, SD 57779 · last May 12, first Oct 2
- Fort Meade, SD 57741 · last May 8, first Oct 3
- Nemo, SD 57759 · last May 28, first Sep 18
- Sturgis, SD 57785 · last May 8, first Oct 3
- Beulah, WY 82712 · last May 12, first Oct 2
Frequently asked questions
- When is the last frost in Deadwood, SD?
- For ZIP code 57732, the average last spring frost (32°F) is May 24, based on NOAA 1991-2020 climate normals for the Deadwood, SD weather station. There is a 1-in-10 chance of a frost after June 6.
- When is the first frost in Deadwood, SD?
- The average first fall frost (32°F) is September 25. There is a 1-in-10 chance of frost by September 9, so tender plants are at risk from that point on.
- How long is the growing season in 57732?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 125 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.